T-Mobile has employed some new technology that is designed to increase its coverage area and go through walls even better. The hotspot you will get is set up to use that technology so coverage is better than ever. That said, every place doesn’t have great coverage -we know this because we all use cell phones. So that is why we ask you to check the T Mobile coverage map before you sign up. We want you to love WiFi on the Go. Nothing is more disappointing than getting something new and have it not be just perfect. So we only want you to have WiFi on the Go if you are in a place where you can truly realize its benefits.